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propose a plan to grade slopes to control erosion and siltation of the affected lands. Construction Materials Rule 3.1.5(3), 3.1.9(1) and (3). Four States' plan is to grade slopes to IH:1V, and stabilize the soil with commercial polymers until vegetation establishes. Vol. 2, p. 514. The Division advised that, despite its recommendation, Four States' plan satisfies the rules. There is no evidence in the record supporting a different conclusion. Plaintiffs state that Four States failed to present a consistent, definitive description of the depth of mining. Construction Materials Rule 6.4.4(f) requires Four States to submit a narrative and/or map identifying the nature, depth and thickness of the deposit to be mined. Four States identified the depth of the deposit at thirty to one hundred twenty five feet, depending on the points at which it was measured. Vol. 2, p. Sll, Item 7. Four States identified its proposed depth of mining as approximately twenty feet. Yol. 2, p. 532 (Mining of the Lower Level, ¶3). Four States complied with Construction Materials Rule 6.4.4(f). Plaintiffs azgue that Four States failed to identify consistent plans to construct and maintain berms, and that it did not address possible threats to public safety associated with the berms causing flooding problems or changing the course of the river. The Division's Allen Sorenson, a geological engineer who specializes in floodplain issues, examined Four States' plans. Vol. 3, p. 1139. Mr. Sorenson rejected the notion that the berms would create a threat to public safety. Vol. 3, p. 1140, 1149-50. Four States is required to constmct and maintain temporary berms for use during mining to comply with county requirements. Vol. 3, p. 1092. These berms must be constructed with gaps to accommodate floodwater flow. Vol 2, p. 535, Vol 3, p. 1110. So, the berms aze designed to ensure that they do not increase floodwater velocity or quantity. Vol. 3, p. 1110, 11 S0. 19